Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

Use GIVING24 at checkout to save 20% on eCourses and books (some exclusions apply)!

51317--9669-Effect of Strain Rate on the Crack Growth Rate of 718 Under Cathodic Potentials

Picture for Effect of Strain Rate on the Crack Growth Rate of 718 Under Cathodic Potentials
Available for download

Crack growth rate (CGR) behavior of UNS N07718 was investigated as a function of K-rate in two different environments under cathodic potentials, a mild environment containing 3.5wt% NaCl and a more aggressive environment containing 0.5M H2SO4.

 

Product Number: 51317--9669-SG
ISBN: 9669 2017 CP
Author: Thodla Ramgopal
Publication Date: 2017
Industry: Materials Selection and Design
$0.00
$20.00
$20.00

Crack growth rate (CGR) behavior of 718 was investigated in two different environments under cathodic potentials i.e. 3.5wt% NaCl and 0.5M H2SO4. The crack growth rate behavior was investigated as function of displacement rate in both environments. The CGR in 3.5wt% NaCl at -1050mV SCE exhibited a plateau at various K-rates. The crack growth rate in 3.5wt% NaCl was a strong function of K-rate with higher K-rate resulting in higher crack growth rate. CGR measurements in sulfuric acid exhibit K dependence. The CGR exhibits a dependence on K-rate in sulfuric acid. CGR measured under constant displacement did give sustained CGR which was substantially lower than the values measured under rising displacement.Constant K tests were performed to understand the separate out the effect of dK/dt form the K effect. The results of the constant K tests suggest that the CGR under constant K is significantly lower than under a positive dK/dt. The above results were formulated in terms of crack tip strain rate and related to the CGR.

Key words: Crack growth rate, K-rate, Cathodic Polarization, Low cycle fatigue, Static Crack Growth

Crack growth rate (CGR) behavior of 718 was investigated in two different environments under cathodic potentials i.e. 3.5wt% NaCl and 0.5M H2SO4. The crack growth rate behavior was investigated as function of displacement rate in both environments. The CGR in 3.5wt% NaCl at -1050mV SCE exhibited a plateau at various K-rates. The crack growth rate in 3.5wt% NaCl was a strong function of K-rate with higher K-rate resulting in higher crack growth rate. CGR measurements in sulfuric acid exhibit K dependence. The CGR exhibits a dependence on K-rate in sulfuric acid. CGR measured under constant displacement did give sustained CGR which was substantially lower than the values measured under rising displacement.Constant K tests were performed to understand the separate out the effect of dK/dt form the K effect. The results of the constant K tests suggest that the CGR under constant K is significantly lower than under a positive dK/dt. The above results were formulated in terms of crack tip strain rate and related to the CGR.

Key words: Crack growth rate, K-rate, Cathodic Polarization, Low cycle fatigue, Static Crack Growth

Product tags
Also Purchased
Picture for Environmentally Assisted Cracking of High Strength Nickel Based Alloys Under Cathodic Protection
Available for download

51318-10700-Environmentally Assisted Cracking of High Strength Nickel Based Alloys Under Cathodic Protection

Product Number: 51318-10700-SG
Author: Ramopal Thodla
Publication Date: 2018
$20.00

Environmentally assisted cracking of high strength nickle based alloys was investigated in 3.5wt% NaCl under cathodic protection.
Picture for Susceptibility to Hydrogen Induced Stress Cracking of Alloy 718 and Alloy 725 Under Cathodic Polarization
Available for download

Susceptibility to Hydrogen Induced Stress Cracking of Alloy 718 and Alloy 725 Under Cathodic Polarization

Product Number: 51315-5597-SG
ISBN: 5597 2015 CP
Author: Gaute Stenerud
Publication Date: 2015
$20.00

 A test project to examine the susceptibility of Hydrogen Induced Stress Cracking (HISC) has been executed. In this project hydrogen charged samples of Alloy 718 and Alloy 725 have been exposed under tensile stress to establish critical stress levels for initiation of HISC.
Picture for 05103 Laboratory Testing of Age-Hardenable Alloys
Available for download

05103 Laboratory Testing of Age-Hardenable Alloys 925 and 718, in Sour Gas Environments

Product Number: 51300-05103-SG
ISBN: 05103 2005 CP
Author: Rainer Behrens, Krupp VDM GmbH; Dinesh C. Agarwal, ThyssenKrupp VDM USA Inc.
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support